.loader{margin:20px;width:48px;height:48px;border:5px solid #000;border-bottom-color:transparent;border-radius:50%;display:inline-block;box-sizing:border-box;animation:rotation 1s linear infinite}@keyframes rotation{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.textarea-container{display:flex;position:relative;width:100%;height:200px}.test-results{padding:10px 5px;text-align:right;background-color:#f0f0f0;color:#666;border:1px solid #000;border-right:1px solid #ddd;font-family:monospace;line-height:1.5em;font-size:1.2em;-webkit-user-select:none;user-select:none;overflow:hidden;min-height:100%;white-space:pre;min-width:30px}textarea{flex:1;resize:none;padding:10px;border-left:none;outline:none;font-family:monospace;font-size:1.2em;line-height:1.5em;overflow:auto}.textarea-container textarea,.line-numbers{height:100%}.input-group{display:flex}